https://www.neowin.net/news/how-to-check-if-your-old-computer-can-run-windows-11-version-24h2/
The recent Windows 11 preview builds reportedly contain a change in the required CPU instruction set, which rendered already unsupported processors physically incapable of running Windows 11 version 24H2, with the operating system simply crashing on boot. If you have an old, unsupported computer that runs Windows 11 and you plan to upgrade it to version 24H2, here is how to check if that old timer has what it takes.
TLDR: You need SSE4.2 on Intel (first-gen Intel Core and newer) and SSE4A on AMD (first-gen Phenom and newer). If you do not know how to check that information, continue reading this guide. Obviously, those with officially supported processors should not care about this problem at all, unless they want to learn how to check what instructions their processors support.
Intel®Core™2 “Wolfdale” E8400 3.0 GHz / 8.00 GB
HP ProDesk 400 G5 SFF PC / Windows 11 Pro / 23H2
Intel®Core™ “Coffee Lake” i3-8100 3.6 GHz / 16.00 GB
